The computed tomography scanner, or CT scanner, was originally designed to provide cross-sectional images of the brain. The word tomography comes from the Greek word tomos, meaning "section," and graphia, meaning "picture."
The computed tomography scanner, or CT scanner, was originally designed to provide cross-sectional images of the brain. The word tomography comes from the Greek word tomos, meaning "section," and graphia, meaning "picture."
The patient lies still on a special table which slides into a round tunnel, called a gantry. The technician can then rotate the gantry or move it forward and backward in order to obtain the necessary view.
In many cases, a patient must be given a contrast material before undergoing a CT scan. During "dynamic CT scanning," iodine dye is either injected into the blood or added to a drink that the patient must ingest.
The computed tomography scanner, or CT scanner, was originally designed to provide cross-sectional images of the brain. The word tomography comes from the Greek word tomos, meaning "section," and graphia, meaning "picture."
Most emergency or shock-treatment centres contain a CT scanner in order to assess trauma victims. CT scans can pinpoint internal bleeding both in the brain and throughout the body.
Brain, chest, and abdominal CT scans are the most common, though physicians also rely on the CT scanner to guide their needles while draining an abscess or performing a biopsy.
The CT scanner is made up of several computer systems, including the host computer, which organizes the entire process. One computer converts the raw data into an image, while another lets the technician control the gantry.
Creating a scanner that could produce images at a faster rate was crucial in the development of tomography, as it reduced the degree of distortion in an image caused when patients breathed and moved.
TSA spokesman Robert Gibbs said a controversial new screening would evolve with travellers' input. Some airline passengers are objecting to the use of revealing full-body scanners and pat-downs for those opting out of scans.
TSA spokesman Robert Gibbs said a controversial new screening would evolve with travellers' input. Some airline passengers are objecting to the use of revealing full-body scanners and pat-downs for those opting out of scans.
A new brain scanner has been developed to help people who are completely paralyzed speak. It enables them to spell words using their thoughts. With fMRI, each letter produces a different pattern of blood flow in the brain.
A new brain scanner has been developed to help people who are completely paralyzed speak. It enables them to spell words using their thoughts. With fMRI, each letter produces a different pattern of blood flow in the brain.